package com.qiy.springcloud.service;

import cn.hutool.core.util.IdUtil;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixCommand;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixProperty;
import org.springframework.stereotype.Service;
import org.springframework.web.bind.annotation.PathVariable;

import java.util.concurrent.TimeUnit;

/**
 * Created on 2020/4/7.
 *
 * @author sehuaqi.
 * 描述：
 */
@Service
public class PaymentService {

    /**
     * 正常访问
     *
     * @param id
     * @return
     */
    public String paymentInfo_OK(Integer id) {
        return "线程池：" + Thread.currentThread().getName() + "paymentInfo_OK, id = " + id;
    }

    /**
     * 正常访问
     *
     * @param id
     * @return
     */
    @HystrixCommand(fallbackMethod = "paymentInfo_TimeOutHandler", commandProperties = {
            @HystrixProperty(name = "execution.isolation.thread.timeoutInMilliseconds", value = "5000")
    })
    public String paymentInfo_TimeOut(Integer id) {
        int timeNumber = 3000;
//        int age = 10/0;
        try {
            TimeUnit.MILLISECONDS.sleep(timeNumber);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        return "线程池：" + Thread.currentThread().getName() + "paymentInfo_OK, id = " + id + "\t超时" + timeNumber + "毫秒";
    }

    public String paymentInfo_TimeOutHandler(Integer id) {
        // 兜底的
        return "线程池：" + Thread.currentThread().getName() + "paymentInfo_TimeOutHandler, id = " + id + " 系统繁忙，进入兜底处理";
    }

    // 下面为服务熔断
    // 可以到这里看属性 com.netflix.hystrix.contrib.javanica.conf.HystrixPropertiesManager
    @HystrixCommand(fallbackMethod = "paymentCircuitBreaker_fallback", commandProperties = {
            @HystrixProperty(name = "circuitBreaker.enabled", value = "true"),   //是否开启断路器
            @HystrixProperty(name = "circuitBreaker.requestVolumeThreshold", value = "10"),  //请求次数
            @HystrixProperty(name = "circuitBreaker.sleepWindowInMilliseconds", value = "10000"),    //时间窗口期 10秒
            @HystrixProperty(name = "circuitBreaker.errorThresholdPercentage", value = "60"),    //失败率达到多少后跳闸
    })
    public String paymentCircuitBreaker(@PathVariable("id") Integer id) {
        if (id < 0) {
            throw new RuntimeException("******id 不能为负数");
        }
        // Hutool工具包 等价UUID.randomUUID()
        String serialNumber = IdUtil.simpleUUID();

        return Thread.currentThread().getName() + "\t" + "调用成功，流水号：" + serialNumber;
    }

    public String paymentCircuitBreaker_fallback(@PathVariable("id") Integer id) {
        return "id 不能负数，请稍后再试， id：" + id;
    }
}
